A36 - Transmitter architecture - SSB and mixers, FM and multipliers
Quiz
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To produce a high frequency from a low frequency, oscillators are designed to put out a high harmonic content. These are called harmonics. Which harmonic of a 7MHz crystal would be used to produce an output of 63MHz?
7th
8th
9th
10th
The 13th harmonic of a 44MHZ crystal is 572 MHz. If the fundamental frequency drifts by 100Hz was is the drift at 572MHz?
5.72kHz
4.44kHz
1.3kHz
1.5kHz
In a transverter for 28MHz to 144MHz the frequency required to be generated by the transverter is ?
116MHz
4032 MHz
178 MHz
!00MHz
In order to change a frequency to another frequency a mixer is used. What Input frequency is required to produce an output frequency of 9MHz from an input frequency of 21MHz?
30 MHz
9MHz
21 MHz
11MHz
A 144 to 146 transmitter requires a VFO running form 133.300 to 135.300 to produce a 10.7MHz output. To produce the VFO you could mix a crystal oscillator running at 132.000MHz with a VFO running from: